Apparatus for unwinding a supply roll in paper processing machines



March 28, 1961 v. HORNSTEIN ET AL 2,977,058

APPARATUS FOR UNWINDING A SUPPLY ROLL IN MAX SCHNEIDER Filed Dec. 15, 1958 ENTORS INV VICTOR HOE/V57 E //V E I?! 0H LOHRMAIV/V RNST KUSE' L I ATTORNEYS PAPER PROCESSING MACHINES L- Lair.-

United States Patent APPARATUS FOR UNWINDING A SUPPLY ROLL IN PAPER PROCESSING MACHINES Victor Homstein, Dusseldorf-Lohausen, Erich I .ohrmann and Max Schneider, Dusseldorf, and Ernst Kusel, Dusseldorf-Lohausen, Germany, assignors. to Jagenberg- Werk A.G., Dusseldorf, Germany Filed Dec. 15,1958, Ser. No. 780,319

Claims priority, application Germany Dec. 18, 1957 '4 Claims. (Cl. 242-551) The present invention relates to means for unwinding the supply roll in paper processing machines such as roll cutting and rewinding machines, and more particularly, has reference to means wherein the peripheral speed of the unwinding roll is determined by a driving or braking mechanism operably associated with the periphery of the supply roll.

The known or existing drive mechanisms consist generally of one or more endless belts, the peripheral speed I of which is governed or. regulated in accordance with the operating speed of the machine, which is fed by the supply roll. With machines of this type, the handling of the relatively heavy supply rolls necessitates the employment of lifting means or other means forming part of the machine, which allow the positioning or locating of the supply roll into the unwinding position. In addition at least one endless belt defining a supporting trough for the supply roll and with thetrough engaging the supply roll from beneath the supply roll and thereafter elevating the supply roll to the unwinding position.

More specifically, the invention includes a swingable frame component, driving and guide rollers journalled in the frame component with the endless belt means trained about the rollers, and the pivotal axis of the frame also constituting the rotation axis of the drive roller for the endless belt means. One of the guide rollers is adjustable to govern the tension of the endless belt means as well as the accurate centering of the supply roll respecting the bearing means for the roll and said adjustment being eifected by mounting such guide roller on a pivoted lever carried by the frame with the position of the lever being determined by a piston and cylinder assembly.

Further objects and advantages of the invention will become more readily apparent from the following description and attached drawings, the drawings illustrating a preferred embodiment of the invention and in which drawings:

Figure 1 is an elevational view partly in cross section showing the relationship of the components prior to the positioning of the supply roll;

Figure 2 is a view generally similar to Figure 1 showing the position of the supply roll at the initiation of the unwinding step, and

Figure 3 is a view along the lines of Figures 1 and 2 Patented Mai-. 28, 1961 ice showing a subsequent position of the apparatus during the unwinding process.

As shown in Figure 1, the unwinding apparatus is generally denoted A, bearings for the unwinding operation are indicated 1, and 2 denotes the side flanges of the spool containing paper roll 3. The spool may be provided with a through shaft or axle, the ends of which can be journalled into bearings 1 or clamping cones (not shown) can be carried by the end flanges of the spool for insertion in the bearings 1.

The apparatus comprises a frame 5 including angularly arranged arms 5a and 5b with the frame being swingable about axle or shaft 4. To effect the swinging of the frame 5,.the arm 5a is provided with anoutwardly olfset arm 8,. to which is connected pistonrod 7 operable in a hydraulic or pneumatic cylinder 6, which is suitably secured to a supporting surfaces as indicated at 6a.

Mounted .on the arm 5a of the frame 5 is a drive roller 9 for endless belt means 10, and it will be seen that the axis of rotation of the drive'roller 9 is the same as that of the shaft 4. A guide roller 11 is journalled adjacent the free end of the arm 5b and an adjustable guide roller 12 is carried by the frame intermediate the juncture of the arms 5a and 5b, with the endless belt means 10 passing around rollers 9, 11 and 12.

The adjustable roller 12 functions to regulate the tensioning of the belt as well as the fine adjustment of the supply roll 3. The roller 12 is mounted on a lever 13 pivotally connected to the frame and the position of the lever can be adjusted by means of a hydraulic or pneumatic piston cylinder unit 14. At the forward or free end of the arm 5b of the frame 5, there is provided an extension means 15, which facilitates the moving of the supply roll 3 into trough portion 10a of the belt means 10, the trough portion 10a being provided by the shape of the frame 5 and the location of the rollers 9, 11 and 12 on the frame.

Any suitable and convenient drive means may be employed for imparting rotation to the drive roller 9, and conduit means are operably connected to the cylinder 6 as will be appreciated by one skilled in the art.

Thus, it will be seen, that the unwinding mechanism is quite simple in structural detail, and the assembly for determining the peripheral speed of the roll 3 also functions as the means for positioning the roll in the bearings 1.

While the operation of the apparatus is deemed apparent from the above description, it may be briefly summarized as follows:

Referring to Figure 1, it will be noted that in the initial position the supply roll 3 is mounted on a supporting or feeding surface 16, so that the extension means 15 of the frame 5 will be at approximately the same level as the surface 16. The roll 3 is then moved into the trough 10a in any suitable manner, whereupon cylinder 6 is actuated to effect a swinging movement of the frame 5 in a clockwise direction, thereby elevating the supply roll until the center of the supply roll registers with the center of the bearings 1, as shown in Figure 2. The vertical height position can be adjusted by means of a corresponding actuation of the cylinder 6, while a correction of the lateral position of the supply roll during its accurate centering respecting the bearings 1 can be obtained by working parts and which is positive and efficient in operation. Furthermore, the frame 5 and its component parts serves the dual functions of determining the peripheral speed ofthe supply roll and properly positioning the supply roll in its bearings.

The invention is not to be confined to any strict conformity with the showings in the drawings, but changes or modifications may 'be made therein, so long as such changes or modifications mark no material departure from the spirit and scope of the appended claims.

7 'Whatis claimed is: V

- 1. An apparatus for unwinding the supply roll of paper processing machines such as roll cutting or rewinding machines, comprising a frame means, roller means journalled in the frame means, at least one endless belt means'trained about said roller means with the roller means being so positioned on the frame means as to provide a supporting trough portion in the belt means for receiving the supply roll, means operably, connected to the'frame means to impart an upward movement to the frame means whereby the trough portion engages the supply roll from beneath to elevate the same during upward movement of the frame means, and means for driving said belt means to rotate the supply roll.

2. An apparatus for unwinding the supply roll of paper 1 processing machines such as roll cutting or rewinding machines, comprising a frame means, roller means journalled in the frame means, at least one endless belt means trainedabout said roller means with the roller means being so positioned on the frame means as to provide a supporting trough portion in the belt means for receiving the supply roll, means operably connected to the frame means to impart an upward movement to the frame means so that the trough portion engages the supply roll from beneath the supply roll to elevate the same during-upward movement of the frame means, and means mounting the frame means for swinging movement with one of said rollers being a drive roller mounted on the same axis1as the axis of the swingingmovement for the frame means. i v

3. The apparatus as claimed'in claim 2 in which another of said rollers is adjustable on the frame to regulate the tensioning of theendless belt means 'as well as accurately center the supply roll relative .to..its':-.bear'ing.

4. The apparatus as claimed in claim 3, wherein said adjustable rolleris mounted on a lever pivotally connected ,to the frame means, and pressure cylinder means being operably connected to the lever to determine the position of the lever.

1 References Cited in the file of this patent UNITED STATES PATENTS Fouse Sept. 21,, 1943 2,345,656 Calleson etal. Apr. 4, 1944 2,441,544 Longfield May 11, 1948 Groll Jan. 17, 1956 

